Hydraulic brake



y 1947- a. F. LOWEKE 2,423,331

" HYDRAULIC BRAKE Filed llay 6, 1944 3 Sheets-Sheet 1 ERWIN ELUWEHE July 1, 1947.

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3 Sheets-Sheet 3 Filed May 6, '1944 \r 3 Ss N9 3 IL 3 8k w! km! N! 3 3mm ERWIN E LUWEHE m I g? a a 7% I I 1 1 I Patented July l, 15.347 .4 y i Q 2,423,331 HYDRAULIC BRAKE v Application May 6, 1944, Serial No. 534,423

- 2 Claims. (01. ma -152) UNlTED STATES Parent OFFICE The present invention relates to improvements tending channels 30, in which are received cirin brake structure, having particular reference to cular rubber sealing rings 32 or the equivalent. high pressure brakes of the type disclosed in the It will be noted that the channels 30 extend into Hollerith copending' application for Brake strucspaced circumferentially extending ribs ture, Serial No. 526,698, filed March 16, 1944. Fragmentary arcuate thrust members 36 are posi- It is the object of the present invention to protioned between the sealing ring 32 and the backvide improved structural designs of brake strucing plate carrying the brake blocks 20. ture of the type described which may be inexpen- The structure for supplying hydraulic pressively manufactured by anyone of several standsure against the sealing rings 32 to radially exard principles of fabrication, 1n pend the same in the channels 30 and in this Other objects and advantages of the present manner apply the brakes, comprises the fittings invention are found in the details of construction 38 supported by the annular member 21.

and the combination and arrangement of parts. Through ported studs 40, communication between In the drawings, wherein several forms of fabthe connector 38 and the channels 30 is through rication embodying the principles of the presentv a transverse Passage It l he understood invention are illustrated. that high pressure fluid is admitted through the Fig. 1 is a vertical cross-sectional view of a conn ctor 38 through the channels safl in radial brake embodying the present invention, cumierentially thereof to radially project the Fig. 2 is a fragmentary cross-sectional vi w of sealing rings 32 in the channels 30 to actuate the a brake'employing rolled strips carrying out the brake blocks principles of the resent invention, Fig. 2 illustrates the manner in which rolled Fig. 3 is a view similar to Fig. 1 of another metal strips are utilized to fabricate brake strucform of the invention employing rolled channels, ture according to the present invention. As

Fig 4 Shows t use of m section for carryshown, the rolled sections 44 define a channel in ing out the principles of the present invention, which the brake blocks 48 are supported, a drop Fig. 5 is a view similar to Fig. 1, illustrating center portion 48 and an inwardly extending the employment of a light metal forging, torque flange 50. Piloted upon the drop center 6 i view similar t Fig 1, showing the portion 48 is arolled metal channel ring 52. Posipresent invention carried out through the use of honed between the channel me b 5 a d the a light, t l ti g, sides of the drop center portion 48 are channel Fig 7 is a i simqar t 1, illustrating members 54 rolled from strip metal. The memthe employment of an extruded'light metal secb l 4 are nnular in shape and carry the sealtion, and ing rings 55, which are of rubber or other suit- Fig 3 is a view i n t Fig 1 i hi th able material to permit radial expansion of the structure comprises the use of stamping's. sealing ring within its channel 54. Positioned Referring to the drawings, in Fig. 1 the brake b tw n h se ling rings, 55 and the brake blocks structureis in the form of a channeled rim mema m ntal arcuate thrust members 58 ber l0 comprising two annular sheet metal'porh h are guided f r radi l movement within tions l2 and I4, each having inwardly extending the channels 54 under the influence of hydraulic flanges l6 secured by bolts iii to form the torque 4o p essu e, admitted through. the connections flange, Arcuate brake blocks 20 are shown with directed illtO the channels 54 against the sealing backing m t 2:, s d a m extending rings 56 in the manner hereafter described. depressions 24 receive the torque from the brake s wn in F g. 2, the connections 60 are shoes 20, Detraotor springs 26 are supported threaded at 52 to receive the hOllOW bolt 5. All from the depressions 24 and function to hold the 45 the Point of fluid c on e channels 54 are brake blocks 20 in assembled as well as retracted p rtu a at 35. Su table connectors 58 formed positions, all in the manner fully disclosed in of sheet metal and apertured to receive the bolt United States patent application Serial No. 64 are hydrogen welded or otherwise connected 275,355, filed May 24, 1939, now Pat t, N to the channels 54 in the manner shown in Fig. 2. 2,350,038, May 30, 1944. 50 The spacers 10 used in conjunction with suitable In lieu of the low pressure expander tube, sealing washers enable the parts to be assembled shown in the aforesaid patent'application, an anin sealing relation through the take up on the nular member 21 is supported within the channel bolt 64. I of the rim. Extending inwardly from the outer In Fig. 3, en ported within the main channel face 28 are a plurality of circumierentially exrim of the brake structure 12, in which the segmental arcuate brake blocks 14- shows the are supported, are nested annular channel members 16 and 18. The channels 16 and 18 may be welded in the position shown providing annular outwardly opening grooves 80, in which the annular sealing rings 8| are supported and react under the influence of hydraulic pressure against the thrust members 82 to radially project the brake blocks 14. The fluid connector 84 is connected to the aperture boss portion 86 of the channel ,16

through a suitable ported hollow bolt 86 extending through'an aperture 80 in the channel 18 and engaging with a nut 82.

' A further arrangement, illustrated in Fig. 4, brake structure fabricated from a mill section 84 in bar form and then rolled into an annular rim and butt welded. The segmental arcuate brake blocks 86 are shown supported in the main channel portion 96. An integral part of the web of the channel 98 are inner channel portions I00 in'which the annular sealing rings 'cast fluid connector I54.

1 blocks I58 and a drop center channel I60 having I02 are supported and radially guided for radially expanding the brakes through the arcuate segmental thrust members I04. A suitable fluid connector I06 is shown welded in position in the channel I00. The torque flange for mounting the brake structure is indicated as I08 and is welded or otherwise suitably secured in the central web portion of the channel 98.

In Fig. 5 is shown a combination of rolled sheet metal parts and a forging to provide a brake structure according to the present invention. As shown, the main channel rim is made of two rolled sections II 0 defining the main channel I I2 for the brake blocks 4, having a drop center channel portion 6, with inwardly extending flanges I I8 to constitute the torque flange. Within the channel H6 is a forged annular part I20 having channels I22 defined therein, in which are received the sealing rings I24 acting against the thrust members I26. The fluid under pressure is conducted to the connector I28 into which the hollow bolt I30 is threaded with suitable apertures connecting with the channels I22.

In Fig. 6 is an arrangement similar to Fig. 5 in which an annular casting I32 is provided in lieu of iorgings shown in Fig. 5, the fluid connector I34 being an integral part of the main casting I32, the remainder of the structure being similar to that disclosed and described with reference to Fig. 5.

Fig. 7 illustrates a further combination of sheet metal, in formed sections, with an extruded section I36 supported upon the drop center channel I31 01' the main sheet metal channel I38 in which the brake blocks I40 are supported. The integral channel portions I42 support the sealing rings I44 for radially expanding action against inwardly extending flanges I62. The channels I64, in which the sealing rings I66 act against the thrust members I68, are defined by complementary stampings I10 having inwardly extending flanges I12 which withthe flanges I62 collectively define the torque flange of the brake structure. Sealing rings I14 prevent fluid leakage from the chamber defined within which the sealing rings I66 are located.

Having thus described my desire to secure and claim by 1. A radial brake structure of sheet metal dished collectively defining. an outer peripheral channel portion, a drop center channel portion and a radially extending torque flange, radially actuated brake blocks supported in said outer peripheral flange, an annular structure supported in said drop center portion and bridged by said brake blocks, annular channels defined in said structure supported in said drop center portion invention, what I comprising a pair and opening towards said brake blocks, sealing rings supported in said last channel portions defining with the bottom thereof fluid chambers,

- and means for directing fluid under pressure into said chambers to radially expand said rings to actuate said brakes.

2. The brake structure defined in claim 1 wherein arcuate thrust members are disposedbetween said sealing rings and said block members.

'ERWIN F. LOWEKE.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Letters Patent is:v

parts of annular form and 

